Configuring a new account

Thunderbird for Linux uses an Account Wizard to help you configure
your email accounts. The Account Wizard should start the first time
you launch the application. If it doesn't, from the Edit
menu, select Account Settings..., and then click
Add Account.... After the Account Wizard starts, to set
up Thunderbird to read your Exchange mail, follow the steps below:

Reading and sending mail

When you send mail, you should see the "Mail Server Password Required"
window. Enter your passphrase and click OK. If you want
Thunderbird to remember your passphrase, select Use Password
Manager to remember this password before clicking OK.

Note:

If you have difficulties sending mail from Thunderbird, try reducing the maximum number of server connections to cache to 1:

From the Tools menu, select Account Settings.

In the section for your IMAP account, click Server
Settings and then Advanced... .